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# Integrate the function $\cos\left(\pi +x\right)$ from 0 to $1$

## Step-by-step Solution

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$-\frac{69}{82}$
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##  Step-by-step Solution 

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We can solve the integral $\int_{0}^{1}\cos\left(\pi +x\right)dx$ by applying integration by substitution method (also called U-Substitution). First, we must identify a section within the integral with a new variable (let's call it $u$), which when substituted makes the integral easier. We see that $\pi +x$ it's a good candidate for substitution. Let's define a variable $u$ and assign it to the choosen part

$u=\pi +x$

Learn how to solve definite integrals problems step by step online.

$u=\pi +x$

Learn how to solve definite integrals problems step by step online. Integrate the function cos(pi+x) from 0 to 1. We can solve the integral \int_{0}^{1}\cos\left(\pi +x\right)dx by applying integration by substitution method (also called U-Substitution). First, we must identify a section within the integral with a new variable (let's call it u), which when substituted makes the integral easier. We see that \pi +x it's a good candidate for substitution. Let's define a variable u and assign it to the choosen part. Now, in order to rewrite dx in terms of du, we need to find the derivative of u. We need to calculate du, we can do that by deriving the equation above. Substituting u and dx in the integral and simplify. Apply the integral of the cosine function: \int\cos(x)dx=\sin(x).

$-\frac{69}{82}$

$-0.8415$

##  Explore different ways to solve this problem

Solving a math problem using different methods is important because it enhances understanding, encourages critical thinking, allows for multiple solutions, and develops problem-solving strategies. Read more

Solve integral of cos(\pi +x)dx from 0 to 1 using basic integralsSolve integral of cos(\pi +x)dx from 0 to 1 using u-substitutionSolve integral of cos(\pi +x)dx from 0 to 1 using integration by partsSolve integral of cos(\pi +x)dx from 0 to 1 using tabular integration

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1
2
3
4
5
6
7
8
9
0
a
b
c
d
f
g
m
n
u
v
w
x
y
z
.
(◻)
+
-
×
◻/◻
/
÷
2

e
π
ln
log
log
lim
d/dx
Dx
|◻|
θ
=
>
<
>=
<=
sin
cos
tan
cot
sec
csc

asin
acos
atan
acot
asec
acsc

sinh
cosh
tanh
coth
sech
csch

asinh
acosh
atanh
acoth
asech
acsch

### Main Topic: Definite Integrals

Given a function f(x) and the interval [a,b], the definite integral is equal to the area that is bounded by the graph of f(x), the x-axis and the vertical lines x=a and x=b

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